Updated at 6:25 p.m.: Revised with details on why the city lacks available garbage trucks.

Dallas is short on garbage trucks, so some residents will start to see delays for trash and recycling pickup this week.

In some circumstances, residents won't have their trash collected until the day after their normal pickup day. Others may see later collection times than normal.

All parts of Dallas could see the delays, and they could last for several months — anywhere between 90 and 120 days, depending on how many garbage trucks are available each day, a city spokesman said. The city has ordered new collection vehicles, which will be put into service as they arrive.

Garbage trucks can go out of commission for a number of reasons, like routine maintenance and repairs. The city has an aging fleet of garbage trucks, Sanitation Services Director Kelly High said.

To complete routes for trash and recycling pickup, the city needs about 130 trucks each day. Some days, sanitation staff can get by with 120, but when that number drops closer to 110, there simply aren't enough trucks to go around.

"We've been putting a lot of money toward the replacement of that fleet over the last five years, but it's one of the things where the need has been so great that although we're making strides, there's still some strides that need to take place," High said.

Couple aging trucks with vacancies in the fleet maintenance staff, and the city just hit a tipping point, he said.

High said the city has added mechanic positions within the sanitation department, including overnight shifts so trucks can be repaired before drivers make their morning routes.

Each day during the truck shortage, sanitation staff will update their website with a list of any areas that didn't get their trash and recycling collected the day before. They'll include estimated collection times, and routes and boundaries of areas that will see delays.

"If you think you've been affected, check our website," High said.

Missed garbage collection can be reported to 311 online. Residents may also call 311 within Dallas city limits or 214-670-5111 outside city limits.